diff --git a/src/MDObjectSyndicationSet.php b/src/MDObjectSyndicationSet.php
index ea74cdd..7b6a5dc 100644
--- a/src/MDObjectSyndicationSet.php
+++ b/src/MDObjectSyndicationSet.php
@@ -60,7 +60,7 @@ final class MDObjectSyndicationSet extends MDValueSet {
      */
     final public static function checkRepositoryIsKnown(string $repo) {
         if (isset(self::REPOSITORIES[$repo])) {
-            return self::REPOSITORIES[$repo];
+            return $repo;
         }
         return false;